* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
ul,li { list-style: none; }
/* 公共样式 */
a {
    color: #333;
    /* 去掉下划线 */
    text-decoration: none;
    }
/* body的背景颜色 */
body { background: #f3f3f3;line-height:1; }
.bor1 {
    border: 3px solid red;
}
.bor2 {
    border: 2px solid blue;
}
.bor3 {
    border: 1px solid green;
}

/* 相对定位 */
.rel { position: relative; }
/* 绝对定位 */
.abs{ position: absolute }
/* 固定定位 */
.fixed { position: fixed; }
/* 隐藏 */
.dsn { display: none; }
/* 宽度100% */
.w100p { width: 100%; }
.h100p { height: 100%; }

/* 颜色 */
.c888{  color: #888; }
.c999{  color: #999; }
.c666{  color: #666; }
.fff { color: #fff; }
.bg-fff { background-color: #fff; }
/* 主题色 */
.base { color: #6aafe7; }
.bg-base { background-color: #6aafe7; }
.active{color: #6aafe7;}
.bb{border-bottom:2px solid #6aafe7;}
.bb2{border-bottom:1px solid #ccc;}
.bb3{border-bottom:1px solid #e7ebee;}
.sc{color: #e87339;}
/* 字体 */
.f10 { font-size: 10px; }
.f12 { font-size: 12px; }
.f14 { font-size: 14px; }
.f16 { font-size: 16px; }
.f18 { font-size: 18px; } 
.f20 { font-size: 20px; }
.f22 { font-size: 22px; }
.f24 { font-size: 24px; }
.f26 { font-size: 26px; }
.f28 { font-size: 28px; }
.f30 { font-size: 30px; }
.f32 { font-size: 32px; }
.f34 { font-size: 34px; }
.f36 { font-size: 36px; } 
.fw-400 { font-weight: 400; }
.fw-500 { font-weight: 500; }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
/* 行高 */
.lh15 { line-height: 1.5; }
/* 弹性盒子 */
.flex { display: flex; }
.jc-c { justify-content: center; }
.jc-sb { justify-content: space-between; }
.jc-sa { justify-content: space-around; }
.jc-se { justify-content: space-evenly; }
.aic { align-items: center; }
/* 盒子排成一列 */
.fdc { flex-direction: column; }
/* 剩余空间分配 */
.fg1 { flex-grow: 1; }
.fww {flex-wrap:wrap;}
.fcc {display: flex;justify-content: center;align-items: center;}

/* margin */
.m-5{margin: 5px;}
.m-10{margin: 10px;}
.m-15{margin: 15px;}
.m-20{margin: 20px;}
.m-25{margin: 25px;}
.m-30{margin: 30px;}
.mt-5 {margin-top: 5px;}
.mt-10 {margin-top: 10px;}
.mt-15 {margin-top: 15px;}
.mt-20 {margin-top: 20px;}
.mt-25 {margin-top: 25px;}
.mt-30 {margin-top: 30px;}
.ml-5 {margin-left: 5px;}
.ml-10 {margin-left: 10px;}
.ml-15 {margin-left: 15px;}
.ml-20 {margin-left: 20px;}
.ml-25 {margin-left: 25px;}
.ml-30 {margin-left: 30px;}
.mr-5 {margin-right: 5px;}
.mr-10 {margin-right: 10px;}
.mr-15 {margin-right: 15px;}
.mr-20 {margin-right: 20px;}
.mr-25 {margin-right: 25px;}
.mr-30 {margin-right: 30px;}
.mb-5 {margin-bottom: 5px;}
.mb-10 {margin-bottom: 10px;}
.mb-15 {margin-bottom: 15px;}
.mb-20 {margin-bottom: 20px;}
.mb-25 {margin-bottom: 25px;}
.mb-30 {margin-bottom: 30px;}

/* padding */
.p-5{padding: 5px;}
.p-10{padding: 10px;}
.p-15{padding: 15px;}
.p-20{padding: 20px;}
.p-25{padding: 25px;}
.p-30{padding: 30px;}
.pt-5 {padding-top: 5px;}
.pt-10 {padding-top: 10px;}
.pt-15 {padding-top: 15px;}
.pt-20 {padding-top: 20px;}
.pt-25 {padding-top: 25px;}
.pt-30 {padding-top: 30px;}
.pl-5 {padding-left: 5px;}
.pl-10 {padding-left: 10px;}
.pl-15 {padding-left: 15px;}
.pl-20 {padding-left: 20px;}
.pl-25 {padding-left: 25px;}
.pl-30 {padding-left: 30px;}
.pr-5 {padding-right: 5px;}
.pr-10 {padding-right: 10px;}
.pr-15 {padding-right: 15px;}
.pr-20 {padding-right: 20px;}
.pr-25 {padding-right: 25px;}
.pr-30 {padding-right: 30px;}
.pb-5 {padding-bottom: 5px;}
.pb-10 {padding-bottom: 10px;}
.pb-15 {padding-bottom: 15px;}
.pb-20 {padding-bottom: 20px;}
.pb-25 {padding-bottom: 25px;}
.pb-30 {padding-bottom: 30px;}